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Related Concept Videos

Autophagy01:27

Autophagy

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Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
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Lysosomal Hydrolases01:22

Lysosomal Hydrolases

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Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
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Delivery Pathways to the Lysosome01:36

Delivery Pathways to the Lysosome

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Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
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Neural Regulation01:37

Neural Regulation

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
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Autophagic Cell Death01:18

Autophagic Cell Death

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Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
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Related Experiment Video

Updated: Oct 9, 2025

In vitro Quantitative Imaging Assay for Phagocytosis of Dead Neuroblastoma Cells by iPSC-Macrophages
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Mitophagy in neurological disorders.

Lijun Zhang1,2, Lei Dai3, Deyuan Li4,5

  • 1Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.

Journal of Neuroinflammation
|December 23, 2021
PubMed
Summary
This summary is machine-generated.

Selective autophagy, a cellular cleaning process, is crucial for brain health. While mitophagy can protect against neurodegeneration, its dysfunction contributes to neurological disorders, highlighting a complex role.

Keywords:
Alzheimer's diseaseAutophagyHuntington's diseaseMitophagyNeurological diseasesStroke

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Area of Science:

  • Cellular Biology
  • Neuroscience
  • Autophagy Research

Background:

  • Selective autophagy, including mitophagy, removes damaged cellular components.
  • Mitophagy is vital for neuronal health, regulating mitochondrial quality and energy metabolism.
  • Dysfunctional mitophagy is implicated in neurodegenerative diseases and acute brain injury.

Purpose of the Study:

  • To review the dual role of mitophagy in neurological disorders.
  • To highlight the neuroprotective and neurodegenerative impacts of mitophagy.
  • To explore therapeutic potential targeting mitophagy in brain conditions.

Main Methods:

  • Literature review of selective autophagy and mitophagy mechanisms.
  • Analysis of mitophagy's involvement in neurodegenerative diseases (Alzheimer's, Parkinson's, Huntington's, ALS).
  • Examination of mitophagy's role in acute brain injuries (stroke, epilepsy, TBI).

Main Results:

  • Mitophagy exhibits both beneficial and detrimental effects in neurological contexts.
  • Proficient mitophagy offers neuroprotection against protein aggregates and damaged mitochondria.
  • Impaired mitophagy contributes to neuronal dysfunction and disease progression.

Conclusions:

  • Mitophagy's complex role necessitates careful consideration for therapeutic strategies.
  • Targeting mitophagy holds promise for treating neurodegenerative diseases and brain injuries.
  • Future research should aim to harness mitophagy's benefits while mitigating its risks.